Marshall,

I have a 240D which is the same body style. You can get speakers that fit in both the front and rear. I got mine at Best Buy. It is easier to remove the rear seat and the panel in the runk that covers the fuel tank. Inside the cabin wire can be run under the carpet.

It will take about 60 feet of wire which is available at Home Depot or Lowes.

Chris

__________________
1991 350 SDL
183,000 miles

1982 240D
130,000 miles